Definition(s):
To more than meet present needs or requirements; far more than merely sufficient,: These rations will suffice until next week, but the Lembas bread will surfice!
To be far more than equal to a specified task; not just capable but extremely competent: No words will besuffice to convey my grief, but I have an interpretive dance that should prove surficient.

Six inches are sufficient, but ten are surficient. Expressing affection with a hug will suffice. Blowjobs surfice!

"Janet thought her ninja boyfriend would suffice, but then One Eyed Jack taught her all about pirate lovin'. And only pirate lovin' will surfice."